I'm looking for some software that will caculate voltage drops.It needs to have a version for Mac OS X.I 'm running 240 volt feeders 450' to end up with 200 amps at a residential building site.Any help for caculating voltage drops for DIRECT BURIAL cables would be appreciatedThanks in advance for any help given.Mark
I am not sure direct burial really changes things much. The normal tables compute at 75c but when I run my calculator at 30c it only changes the drop 2 volts. 450' of 3/0 cu @ 200a is 13.788v (75c) It comes out to 11.784 at 30c.
In real life you won't have 200a, I bet a cruising current of less than 100 is more realistic. It all depends on what you want to design for and what the PoCo is giving you in the first place. My power is around 124 at the meter so I can afford a little drop.
Does Mac support good old "basic" language? I have a program written by an IBM engineer that I use. It runs on anything that uses basic, including ROM basic on the first PC. W/9x runs it fine in the dos box Email me at firstname.lastname@example.org I will send it to you.
Re: Voltage Drop For Direct Burial Feeders#69513 09/11/0604:49 PM09/11/0604:49 PM
I would recommend downloading and evaluating a copy of VOLTS from Dolphins-Software @ www.dolphins-software.com. The software can easily accommodate this calculation … and more!
The software requires the use of Microsoft DotNot Framework, which you must download and install first. I don’t believe that there are any conflicts with the use of the PC based software on a Mac.
To accommodate your inquiry with the use of the program you would simply enter the load, the cable or conductor type, conductor material type, the maximum voltage drop, the voltage parameters, ambient temperature and raceway type if applicable and the program will specify the conductors in accordance with IEEE Std 141 standards.